The first day of menstruation is considered the first day of the last period of menstruation (so the obstetric period of pregnancy is established). We all understand that there was actually not yet on the second day of menstruation of pregnancy, but it is for convenience that this particular point of reference is used.
The term of pregnancy in some situations is considered to be on other points of reference (the estimated date of conception / date of the embryo, etc.), but we will not consider these situations! So, let's go!
The first 2 weeks is the process of preparing the body to conceive. You will not recognize in advance what kind of cycle these 2 weeks and become the first two weeks of your pregnancy, since only 4 weeks from the start of menstruation you will learn about your pregnancy.
At this time, in one of the uterine pipes, a sperm and egg cells occur. After merging into one cell, they will be called the zygote. Sometimes the fertilization of two or more eggs can occur, in this case there is not one, and two or more zygotes.
zygote usually contains 46 chromosomes: 23 from mom and 23 from dad. These chromosomes determine the sex of the child, many features (eye color, nose shape, etc.), as well as characteristics of character and behavior.
If the future mother endured the child calmly, without complications, it is rather an exception to the rules. In the early and later period of women, risks lie; Only physically strong, as well as cautious ladies in the position avoid problems and give birth to a healthy baby. Doctors highlight the most dangerous periods of the intrauterine life of the fetus, which does not interfere with knowing and pregnant women to save their little miracle.
from a tiny lump of cells to a full-fledged person who can exist in the outside world - such evolution occurs within 9 months. If you "run by a gallop" in trimesters - conditional periods, for which doctors share the time of the fetus - will be traced that it happens in the maternal womb month after the month. So:
Developing inside the body of the mother, the baby is not "cut off from reality" - it feels changes in the environment, and in the external, and in the uterine; The result becomes the reaction of the fetus, sometimes negative. Among the most dangerous - disorders in the development, leading to miscarriages, and in the later dates - to premature childbirth.
decades of obstetrices and gynecologists were observed as pregnancy occurred, and finally allocated gaps in which the risks for the life of the baby are highest due to the increased vulnerability of the mother's body.
Doctors have found such a pattern: the beginning of critical periods of pregnancy, as a rule, comes on the days when women would have expected monthly, do not be in position. Randomly or not, in such weeks the fruit, as well as the placenta, develop most intensively.
If a woman first made an abortion, dangerous for the next pregnancy consider the period on which the procedure was conducted. The same refers to the previous miscarriages, the death of the child in the womb.
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For a period of 9 week of pregnancy, the child develops very quickly, and the mother may displays toxicosis and fatigue. But this is a temporary phenomenon that will soon pass.
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